Tung-Sol 7581A Power Vacuum Tube (Matched)
Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.You need more clean headroom? The new Tung-Sol 7581A vacuum tube is the answer. This tube is an upgraded 6L6GC tube but willprovide more headroom than typical 6L6GC tubes. The 7581-A power tube has a plate dissipation rating of 35W, as opposed to the 6L6GC and 7581 rating of 30W. The 7581A tube can be used in any 6L6 based tube circuit.
From our review: "Balanced, is the first word that comes to mind when I think about the sound. Other descriptive words would include detailed, rich and responsive. The bass response, midrange and treble were very balanced and the EQ could essentially be left flat.Very rich sounding with enough shimmer and harmonics to put a smile on my face."
A fantastic choice for your Fender tube amp, Ampeg amps normally using 7027A tubes, Music Man amps, or any other 6L6 based tube amp where you need to increase headroom.
Other Tung-Sol tubes 
6L6 Tube TypesAdditional Information and Downloads
Reviews:
6L6 Tube Review
Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System
Downloads:
Tung-Sol 7581A Datasheet (PDF)
Download Adobe Acrobat PDF reader
Warranty Information and Return Policy
Warranty Period: 3 monthsAll our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)
If you receive a tube that does not perform to the manufacturer's specifications, please do the following:
- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice.
Ratings & Reviews
32 reviews
best modern production power tube - opens up any 6L6 amp!
by Shiver
I have not found a single 6L6 (guitar) amp yet that does not massively benefit from this tube. It really will 'open up' your amp, if you're battling with that 'blanket over the speaker' sound, or need more clarity. Balanced, somehow bringing out character in all frequency registers. Chime and bell-like tones from the top end all through your midrange, the lows are unbelievably tight and articulate, and 'icepick' highs are tamed, leaving you with a well-rounded sound that reduces ear fatigue.
In my Silvertone 1484, they transformed it from a harsh, jangly, uncoopertive little thing, into a classic rock machine, now usable all across its register. In my Mesa Dual Rec, this amp is absolutely THUNDEROUS now. And unlike most 6L6GC, these actually sound great when lightly overdriven! If you're chasing that "pushed to the explosion point" heavy rhythm tone, without ACTUALLY exploding something, this is a fantastic option.
Best New 6L6 Tube
by Mark
This is the best new 6L6 type tube I have used. This tube reminds me of the Svetlana Winged C. I hope these tubes are around for a while.
I put these in a '68 Custom Vibrolux Reverb. It woke this amp up and increase dthe headroom.
Don't hesitate to buy this tube, you wont be disappointed
Great audio tube!
by JD
I use these as driver tubes in my Line Magnetic 518ia integrated audio amp. Improvements include clarity and resolution. Stock tubes sound glassy when compared.
Great sounding tubes
by Ramil
Lot of headroom. Big sound, punchy, clear, articulate. Very balance across the spectrum. I think tigher bottom than 6l6 and kt66 without sounding thin and less mid than el34 without sounding mid scooped. Sweet high end. It’s kind of straightforward sounding with not much harmonic complexity. I like it more than the el34 because is fuller sounding less focused and more than 6l6 because of the balanced tone not scooped mids. However I like more the kt66 because of the complex harmonic content on the notes.
Awesome with PrimaLuna
by Kevin T.
Love this tube. Using it with PrimaLuna Dialogue HP monoblock amps. Have used EL34, KT120 and KT150, and this tube beats them all...but with some caveats. In Ultralinear, the sound is overblown, with exaggerated bass. But in triode, the sound is sublime, with great bass, beautiful, saturated mids, and detailed, yet non aggressive highs. Detail retrieval is terrific. Although the KT150’s are fabulous, this tube adds a touch more flesh to the sound while still maintaining great bass. Highly recommended with PrimaLuna amps.